This entry provides two measures of the degree of urbanization of a population. The first, urban population, describes the percentage of the total population living in urban areas, as defined by the country. The second, rate of urbanization, describes the projected average rate of change of the size of the urban population over the given period of time. Additionally, the World entry includes a list of the ten largest urban agglomerations. An urban agglomeration is defined as comprising the city or town proper and also the suburban fringe or thickly settled territory lying outside of, but adjacent to, the boundaries of the city.